Suspension system for a vehicle including an electromagnetic actuator
First Claim
1. A suspension system for a vehicle, comprising:
- an electromagnetic actuator including;
a sprung-side unit connected to a sprung portion;
an unsprung-side unit which is connected to an unsprung portion and which is movable relative to the sprung-side unit in association with a movement of the sprung portion and the unsprung portion toward and away from each other; and
an electromagnetic motor, the actuator being configured to generate, based on a force of the electromagnetic motor, an actuator force that is a force with respect to a relative movement of the sprung-side unit and the unsprung-side unit;
a suspension spring which is disposed in parallel with the electromagnetic actuator and which connects the sprung portion and the unsprung portion and which elastically supports the sprung portion and the unsprung portion relative to each other;
a connecting mechanism which includes a support spring that connects;
one of the sprung-side unit and the unsprung-side unit; and
one of the sprung portion and the unsprung portion to permit said one of the sprung-side unit and the unsprung-side unit to be elastically supported by said one of the sprung portion and the unsprung portion, the support spring being different from the suspension spring and disposed in series with the electromagnetic actuator; and
a controller which includes a target-actuator-force determining portion configured to determine, according to a prescribed control rule, a target actuator force that is the actuator force required to be generated by the actuator, the controller being configured to control the actuator force to be generated by the actuator, based on the target actuator force,wherein the target-actuator-force determining portion is configured to determine the target actuator force on the basis of;
(a) a required acting force that is a force required to act between the sprung portion and the unsprung portion by the actuator and the connecting mechanism; and
(b) an inertial force of said one of the sprung-side unit and the unsprung-side unit with respect to a displacement of said one of the sprung portion and the unsprung portion, while utilizing;
a first transfer function that is a transfer function by which is outputted an amount of a relative displacement of said one of the sprung-side unit and the unsprung-side unit relative to said one of the sprung portion and the unsprung portion when the actuator force is inputted, the relative displacement being generated from the support spring permitting said one of the sprung-side unit and the unsprung-side unit to be elastically supported by said one of the sprung portion and the unsprung portion; and
a second transfer function that is a transfer function by which is outputted an actual acting force that is a force which actually acts between the sprung portion and the unsprung portion when the amount of the relative displacement is inputted.
1 Assignment
0 Petitions
Accused Products
Abstract
A suspension system for a vehicle, including: an electromagnetic actuator configured to generate an actuator force and including a sprung-side unit connected to a sprung portion, an unsprung-side unit connected to an unsprung portion, and an electromagnetic motor; a connecting mechanism; and a controller including a target-actuator-force determining portion, the determining portion being configured to determine a target actuator force based on: (a) a required acting force that is a force required to act between the sprung and unsprung portions; and (b) an inertial force of one of the sprung-side and unsprung-side units, while utilizing: a first transfer function by which is outputted an amount of a displacement of the one of the sprung-side and unsprung-side units when the actuator force is inputted; and a second transfer function by which is outputted an actual acting force which actually acts between the sprung and unsprung portions when the displacement amount is inputted.
58 Citations
10 Claims
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1. A suspension system for a vehicle, comprising:
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an electromagnetic actuator including; a sprung-side unit connected to a sprung portion; an unsprung-side unit which is connected to an unsprung portion and which is movable relative to the sprung-side unit in association with a movement of the sprung portion and the unsprung portion toward and away from each other; and an electromagnetic motor, the actuator being configured to generate, based on a force of the electromagnetic motor, an actuator force that is a force with respect to a relative movement of the sprung-side unit and the unsprung-side unit; a suspension spring which is disposed in parallel with the electromagnetic actuator and which connects the sprung portion and the unsprung portion and which elastically supports the sprung portion and the unsprung portion relative to each other; a connecting mechanism which includes a support spring that connects; one of the sprung-side unit and the unsprung-side unit; and one of the sprung portion and the unsprung portion to permit said one of the sprung-side unit and the unsprung-side unit to be elastically supported by said one of the sprung portion and the unsprung portion, the support spring being different from the suspension spring and disposed in series with the electromagnetic actuator; and a controller which includes a target-actuator-force determining portion configured to determine, according to a prescribed control rule, a target actuator force that is the actuator force required to be generated by the actuator, the controller being configured to control the actuator force to be generated by the actuator, based on the target actuator force, wherein the target-actuator-force determining portion is configured to determine the target actuator force on the basis of;
(a) a required acting force that is a force required to act between the sprung portion and the unsprung portion by the actuator and the connecting mechanism; and
(b) an inertial force of said one of the sprung-side unit and the unsprung-side unit with respect to a displacement of said one of the sprung portion and the unsprung portion, while utilizing;
a first transfer function that is a transfer function by which is outputted an amount of a relative displacement of said one of the sprung-side unit and the unsprung-side unit relative to said one of the sprung portion and the unsprung portion when the actuator force is inputted, the relative displacement being generated from the support spring permitting said one of the sprung-side unit and the unsprung-side unit to be elastically supported by said one of the sprung portion and the unsprung portion; and
a second transfer function that is a transfer function by which is outputted an actual acting force that is a force which actually acts between the sprung portion and the unsprung portion when the amount of the relative displacement is inputted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification